1113 'The Solo Oscillation' Press Release Posted December 22, 2017

CBS has issued the press release for the January 11 episode of The Big Bang Theory, "The Solo Oscillation". Laurie Metcalf reprises her role as Sheldon's mother, Mary, and Brian Posehn returns as Bert in the episode.

The Solo Oscillation – When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Also, Bert the geologist replaces Wolowitz in the band Footprints on the Moon, and Sheldon finds Penny a surprising source of scientific inspiration, on THE BIG BANG THEORY, Thursday, Jan. 11 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

More about the episode

After Sheldon decides to work solo without Amy, she turns to Leonard to work together on a series of science experiments. Meanwhile, geologist Bert replaces Howard in Footprints on the Moon, while Sheldon gets an unexpected source of scientific inspiration from Penny.